Thread-controlling mechanism for sewing-machines.



D. S. SEYMOUR.

THREAD CONTROLLING MECHANISM FOR SEWiNG MACHINES.

APPLICATION FILED NOV. 5, 19 10.

Patented Apr. 13,1915.

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WITNESSES HE NORRIS PETERS c0.PH010 1.lT. -iovv WASHINGTON. D C.

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DUDLEY S. SEYMOUR, OF OAK PARK, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

Patented Apr. 13, 1915.

Application filed. November 5, 191.0. Serial No. 580,917.

To all whom it may concern Be it known that I, DUDLEY S. SEYMOUR, a citizen of the United States, residing at Oak Park, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Thread-Controlling Mechanism for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

The invention relates to new and useful improvements in sewing machines, and more especially to thread controllers for sewing machines.

An object of the invention is to provide a thread controller which is especially adapted for use in connection with a long arm cylinder machine, wherein the feed is lengthwise of the arm.

The invention consists in the parts and arrangements hereinafter described and set forth in the appended claims.

In the drawings Figure 1 is a longitudinal sectional view through the upper portion of the overhanging arm. Fig. 2 is a plan view of the thread controller and its connection to the presser foot lifting mechanism. Fig. 3 shows hand lever for lifting the foot.

The sewing machine to which my invention is appliedyis of the long overhanging arm type in which there is a cylindrical bed plate and a feeding mechanism for feeding the material longitudinally of the overhanging arm, and bed plate. The bed plate has been omitted for the sake of clearness and for the further reason that it has no part in the present invention.

The usual standard 1 carries an overhanging arm 2 in which is mounted the main shaft 3 operated from a driving pulley 4c, in the well known manner. The bar 5 reciprocates in hearings in the forward end of the overhanging arm, and carries atits lower end preferably two needles, one of which is indicated at 6. The needle bar is connected by a link 7 to the crank on the forward end of the main shaft 3.

The presser foot 8 is of the usual construction and is mounted at the lower end of a presser bar 9 mounted to reciprocate in the forward end of the overhanging arm. The presser foot is arranged so as to cooperate with the feed 10 that feeds the material,

mounted in a direction longitudinally of the overhanging arm, and underneath the same. The presser bar 9 is a short bar terminating at a point below the crank disk carried by the forward end of the main shaft. A spring 11 is secured at one end by a bolt 12 to the under side of the overhanging arm, and at its free end rests on the top of the presser bar 9. A screw 13 threaded into the under face of the overhanging arm, has its head resting against the spring 11 and serves as a means for increasing the pressure of the spring 11 on the presser bar 9.

The presser bar is lifted by means of a rock shaft 14: which is mounted in suitable bearings in the overhanging arm, and is connected at one end at 15 to a link 16 which in turn is connected at 17 to an arm 18, rigidly fastened to the presser bar. The arm 19 of the rock shaft 14 is connected by a rod 20 to a crank arm 21 carried by a short shaft. This shaft carries in turn an arm 22 indicated in dotted lines in Fig. 1, which arm is adapted to be connected to a suitable treadle.

The rock shaft 14 as clearly shown in Fig. 2, consists of a sleeve which is rigidly attached to the supporting shaft proper, mounted to oscillate in bearings in the overhanging arm. This rock sleeve or shaft 14: carries a third arm 23. A thread controller 2 1 is pivoted at 25 to a bracket attached to the upper face of the overhanging arm and is connected by the link 26 to the arm 23 of the rock shaft 1 1. The link 26 extends through a slot formed in the upper face of the overhanging arm, and the rock shaft 14 and arms carried thereby, and also the crank arm 21, are each mounted within the overhanging arm. The thread controller 24, is formed in two sections, the outer one of which 27, fits in a recess formed in the face of the inner section and is adjustably secured thereto by a screw 28 passing through a slot 29 formed in the section 27. A thread guide 30 is secured to the outer end of the section 27 by a screw 31. Said thread guide is provided with a plurality of thread eyes as shown in Fig. 2, so that two threads may be separatelyguided to the needles. A second thread guide 32 is attached to the thread controller 24 A tension device 33 is secured to the overhanging arm, and ,a tension device is provided for each thread. The thread is led from the supply through the tension devices, then through the guide 32 to the guiding eyescin the thread guide 30. On the upper end of the needle bar are thread guides 34 which reciprocate with the 5 needle bar. The needle threads after passing through the thread guide 30 are led through the thread guides 34; on the needle bar, and thence underneath the guiding lip 35 to the eyes of the needles,

io $1 ed rod extended as shown in Figfj Q, so as tocontactfwith tlieface'of the bearing ex:

tion. TheQa'rmPIQ provided with anopen 1 rgg sslwhieh ngags theheiit end of the rod 20, as sho wnfin dotted lines in Fig. 1'1" The spring 137 will hold' tlirehrod' to the extreme rh a-6a fries from" a seat the "arm 19. allows theipres'ser foo't to ,vibrate up and down; with the arm; without putting the same uiider'the'strainjof lifting the arms 22 andQtreadle connections, hen it isdesired to liftthe Presserfoot, fthe arm 22 is a depressed and through the rod'QO and rock shaft l l, the presser, foot is raised. As a and; means, for "lifti'ng the 'presser foot, which is, readily a'cce'ssihleto the operator, llha v'e provided 'thearm 23 Witha projection 39, A cam 4'O c ontactsvv,ith said projection eased is mounted on'ja short stud carrying a hpna, lever lli'jon outer endi Byi li turnihgjof the hand lever, the cam operated thereby, will force the arm 23 in a direction to raise thepres'serfootij I In the operation of my device,'thef thread controller will befraised and lowered sli h y with a qfe i s e a; he m hews at d'k fo'g 'fiv n are height a at naawiaa w r m thefebjthe'ipresser fjoot' slightly {in the wel v z ma in -i ;i th ab imss jifld rfiefii h th 3 5 06? i ie 5 1 wilil ii d l yl b lc i i 11 2 5 1 m -011a 241 will, be raised "or 1 wered in accordance ithvvheth'er the fabric increases thickness or de cifease s thicl'iness. :"This ng, and iowe ngtdf" the t rea en roilel il fe t vf ndepen ent @f e iid e en s impartedthereto he movements of the to edle, seam i 1 1 1 61", endfof; its istrolge' g a a rodfQOQcarrijeS a collar86' and a "'spring 3? 7 pend upon the position of the thread controller 24. WV hen the fabric increases in thickness, the thread controller-2i will be lowered and a greater amount of thread will be pulled off, while on the other hand, if the fabric decreases in thickness, the presser foot takes a normally lowered position and raises the thread controller 24 so that less thread is pulled off from the supply. I have therefore, provided means whereby the ex act amount;'of thread required for the formation er the'stitch isshpp'lied. I have also provided a -'vei *snnp1e thread controller, as ft 'he oh ly inovable thread eye other than thosecarried byfthe thread controller is the thread systems needle bar. The thread runs substantially straight the entire length of the overhanging arm, *th us avoiding I unnecessary tensioir and wear on'the thread.

In order to vary the action of the thread doritroller for any given thickness of materialfilf ifiay a dj ust 'thesection-Q? of the thread *control ler so 'as to lengthen orshorten the thread controller arm. lhen again, the

thread' giiide 3O 'is's'ecure'd to the end of the armsci'eii 31 and byloosening this screwythe angular position of the thread a 'i'm -o f the thread gdide 30' maybe varied, thus again varying the effective action of the threadcontiol ler.

' 'l-l-a'i' ihg'tlrus particularly described my invention, what I elaim new and desire to secure by Letters Patent,- is P i Thehoinbinatioi'r of-a presser foot, of'a roch'i g'inenib'er connected to'said presser foot 'for lifting the sam -a thread controller inounted on a stationary pivot independe ntl'ypf said rocking member, and a link connecting said thread controllcr to said rockiiigihember, wherebythe movements of the Pi f S'ser r001: are imparted to the thread eoaaouerand the latter is inactive except during the movement ofthe presse'r foot. 'ii'2ii'Tliecombination of apresser foot, a presser bar, a-r ockin'g member, a link'coniifecti'rigsaiid ro''cking'"-inenibe'r to said presser baff 5L ahead chntrdller mounted on a Sta tionary pivot and a*linlv'connectingsaid thread contifoller t6 said rocking member.

"3.The combiiiati oiroha presser bar, a slack thi'ead controller; hieans for connectiirg the slack thread controller to 'the 'p'r'esser whereby the movements of'the iiiesseir barar aapaaea to the'slack -thiead'contrbller, slack -th'read controller being formed 1n,sect1ons,irn'eans for connecting "said" secti6ns,"said outer section having a thread guide carried thereby."

ico'nfiectihg said shawls-eta controller to the e-seer ear anarch sm" movein'ents' of th''ffpre'sser. baif'aref'iinpartd tothe 'slack thread controllery-a thread guide m'ounted on the free end of the slack thread con- The/combination 'fa 'presser bar, a n- Voted slack thread controller, "means for troller, and means for permitting the adjustment of the thread guide bodily to and from the pivotal connection of the thread controller.

5. The combination of a presser bar, a pivoted slack thread controller, means for connecting said slack thread controller to the presser bar, whereby the movements of the presser bar are imparted to the slack thread controller, a thread guide mounted on the free end of the slack thread controller, means for permitting adjustment of the thread guide to and from the pivotal connection of the thread controller, and means whereby the angular position of the thread guide may be varied.

6. A sewing machine including in combination, an overhanging arm, a presser bar mounted therein, a rocking member mounted within said overhanging arm and connected to said presser bar, a thread controller mounted on a stationary pivot carried by the upper face of the overhanging arm, and a link for connecting said thread controller to the rocking member.

7. A sewing machine including in combination, an overhanging arm, a needle bar mounted in the overhanging arm, a presser bar mounted in said overhanging arm, a rocking sleeve pivotally mounted within the overhanging arm, a link located in the overhanging arm, and connecting the presser bar to the rock sleeve, a thread controller pivoted on the upper face of the overhanging arm, and extending longitudinally thereof with its free end nearest the needle bar, a link pivoted to the thread controller and to said rock sleeve.

8. A sewing machine including in combination, an overhanging arm, a needle bar, a thread guide carried by the upper end of the needle bar, a tension device mounted on the overhanging arm, a thread controller pivoted to the upper face of the overhanging arm and extending longitudinally thereof, a thread guide carried by the thread controller at a point adjacent the thread guide on the needle bar, and a second thread guide carried by the thread controller at a point adjacent its pivotal connection, a presser bar, and means for connecting the presser bar with the thread controller.

9. The combination of a presser foot, a rocking member connected to said presser foot, a second rocking member mounted on a stationary pivot, means for connecting said rocking members, whereby a movement of the presser foot will be imparted to both rocking members, and a thread-guiding member carried by said second rocking member.

10. The combination of a presser foot, a rocking member partaking of the movement of said presser foot, a second rocking member mounted on a stationary pivot, and means interposed between the rocking members, whereby the movement imparted to the first named rocking member will be reversed upon the second rocking member, and a thread-guiding member carried by said second rocking member.

11. In a sewing machine, a needle bar, a thread eyelet carried thereby, a rocking frame carried upon the machine frame, means to vibrate said rocking frame, and a plurality of thread eyelets carried by said rocking frame and located at different distances from the pivotal point of said rocking frame.

12. In a sewing machine, a needle bar and means to operate it including a swinging link, a presser bar mounted in a bearing in a horizontal plane below said swinging link, a rocking frame, connections between said presser bar and said rocking frame, a second rocking frame mounted on a stationary pivot and in a horizontal plane above said first rocking frame and connected with said first rocking frame, and a thread-guiding member connected to said second rocking frame.

In testimony whereof I afiix my signature, in presence of two witnesses.

DUDLEY S. SEYMOUR.

Witnesses:

C. MoNEIL, A. B. CLo'rHmR.

Uopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

